<template>
  <div>
    <!--面包屑导航区-->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>商品管理</el-breadcrumb-item>
      <el-breadcrumb-item>编辑商品</el-breadcrumb-item>
    </el-breadcrumb>

    <el-card>
      <!--提示信息-->
      <el-alert title="编辑商品信息" type="info" center show-icon :closable="false"></el-alert>
      <!--步骤条-->
      <el-steps :space="200" :active="activeIndex - 0" finish-status="success" align-center>
        <el-step title="基本信息"></el-step>
        <el-step title="商品参数"></el-step>
        <el-step title="商品属性"></el-step>
        <el-step title="商品图片"></el-step>
        <el-step title="商品内容"></el-step>
        <el-step title="完成"></el-step>
      </el-steps>
      <!--tab标签栏-->
      <el-form :model="editForm" :rules="editFormRules" ref="editFormRef" label-width="70px" label-position="top">
        <el-tabs v-model="activeIndex" tab-position="left">
          <el-tab-pane label="基本信息" name="0">
            <el-form-item label="商品名称" prop="goods_name">
              <el-input v-model="editForm.goods_name"></el-input>
            </el-form-item>
            <el-form-item label="商品价格" prop="goods_price">
              <el-input v-model="editForm.goods_price" type="number"></el-input>
            </el-form-item>
            <el-form-item label="商品重量" prop="goods_weight">
              <el-input v-model="editForm.goods_weight" type="number"></el-input>
            </el-form-item>
            <el-form-item label="商品数量" prop="goods_number">
              <el-input v-model="editForm.goods_number" type="number"></el-input>
            </el-form-item>
            <el-form-item label="商品分类">
              <el-cascader v-model="editForm.goods_cat" :options="cateList" :props="cascaderProps" style="width: 300px"
                disabled></el-cascader>
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane label="商品参数" name="1">
            <el-form-item :label="item.attr_name" v-for="item in manyTableData" :key="item.attr_id">
              <el-checkbox-group v-model="item.attr_value">
                <el-checkbox :label="cb" v-for="(cb,index) in item.attr_vals" :key="index" border></el-checkbox>
              </el-checkbox-group>
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane label="商品属性" name="2">
            <el-form-item :label="item.attr_name" v-for="item in onlyTableData" :key="item.attr_id">
              <el-input v-model="item.attr_vals"></el-input>
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane label="商品图片" name="3">
            <el-upload action="http://127.0.0.1:8888/api/private/v1/upload" :on-preview="handlePreview" :file-list="imgList"
              :on-remove="handleRemove" list-type="picture" :headers="headerObj" :on-success="handleSuccess">
              <el-button type="primary">点击上传</el-button>
            </el-upload>
          </el-tab-pane>
          <el-tab-pane label="商品内容" name="4">
            <quill-editor v-model="editForm.goods_introduce"></quill-editor>
            <el-button type="primary" class="btnEdit" @click="postEdit">编辑商品</el-button>
          </el-tab-pane>
        </el-tabs>
      </el-form>
    </el-card>

    <!--图片预览-->
    <el-dialog title="图片预览" width="50%" :visible.sync="previewDialogVisible">
      <!--内容主体-->
      <img :src="previewPath" alt="" class="previewImg">
    </el-dialog>
  </div>
</template>

<script>
export default {
  name: 'Edit',
  data () {
    return {
      cateList: [],
      // 指定级联选择器的配置对象
      cascaderProps: {
        expandTrigger: 'hover',
        value: 'cat_id',
        label: 'cat_name',
        children: 'children'
      },
      activeIndex: '0',
      editForm: {
        goods_name: '',
        goods_price: 0,
        goods_weight: 0,
        goods_number: 0,
        goods_cat: [],
        pics: [],
        goods_introduce: '',
        attrs: []
      },
      editFormRules: {
        goods_name: [{
          required: true,
          message: '请输入商品名称',
          trigger: 'blur'
        }],
        goods_price: [{
          required: true,
          message: '请输入商品价格',
          trigger: 'blur'
        }],
        goods_weight: [{
          required: true,
          message: '请输入商品重量',
          trigger: 'blur'
        }],
        goods_number: [{
          required: true,
          message: '请输入商品数量',
          trigger: 'blur'
        }]
      },
      // 商品参数列表
      manyTableData: [],
      // 商品属性列表
      onlyTableData: [],
      // 已上传图片列表
      imgList: [],
      // 待上传图片列表
      tmpImgList: [],
      // 图片上传请求头
      headerObj: {
        Authorization: window.sessionStorage.getItem('token')
      },
      // 预览图片url
      previewPath: '',
      // 图片预览对话框显示状态
      previewDialogVisible: false
    }
  },
  created () {
    this.getCateList()
    this.getGoodsInfo()
  },
  methods: {
    // 获取商品信息
    async getGoodsInfo () {
      const {
        data: res
      } = await this.$http.get(`goods/${this.$route.params.id}`)
      if (res.meta.status === 200) {
        this.editForm = res.data
        // split 得到的字符数组不能绑定到级联选择器，用map转数字数组  ['1','3','6'] => [1,3,6]
        this.editForm.goods_cat = this.editForm.goods_cat.split(',').map(Number)
        this.getAttrData()
        this.getImgList()
      } else {
        this.$message.error(res.meta.msg)
      }
    },
    // 获取商品分类数据
    async getCateList () {
      const {
        data: res
      } = await this.$http.get('categories')
      if (res.meta.status === 200) {
        this.cateList = res.data
      } else {
        this.$message.error(res.meta.msg)
      }
    },
    getAttrData () {
      // 处理商品参数数据
      this.editForm.attrs.forEach(item => {
        if (item.attr_sel === 'many') {
          // 全部参数
          item.attr_vals = item.attr_vals ? item.attr_vals.split(',') : []
          // 已选参数
          item.attr_value = item.attr_value ? item.attr_value.split(',') : []
          this.manyTableData.push(item)
        } else if (item.attr_sel === 'only') {
          this.onlyTableData.push(item)
        }
      })
    },
    getImgList () {
      this.editForm.pics.forEach(item => {
        this.imgList.push({
          name: item.pics_id,
          url: item.pics_big_url,
          pic: item.pics_big
        })
      })
    },
    // 图片预览
    handlePreview (file) {
      this.previewPath = file.url
      this.previewDialogVisible = true
    },
    // 移除图片
    handleRemove (file) {
      if (file.response) {
        const filePath = file.response.data.tmp_path
        const i = this.tmpImgList.findIndex(x => x.pic === filePath)
        this.tmpImgList.splice(i, 1)
      } else {
        const filePath = file.pic
        const i = this.imgList.findIndex(x => x.pic === filePath)
        this.imgList.splice(i, 1)
      }
    },
    // 图片上传成功hook
    handleSuccess (response) {
      if (response.meta.status === 200) {
        this.$message.success(response.meta.msg)
        this.tmpImgList.push({
          pic: response.data.tmp_path
        })
      } else {
        this.$message.error(response.meta.msg)
      }
    },
    // 提交编辑商品
    postEdit () {
      this.$refs.editFormRef.validate(async valid => {
        if (valid) {
          const pics = []
          this.imgList.forEach(item => {
            pics.push({ pic: item.pic })
          })
          pics.push(...this.tmpImgList)
          const form = {
            goods_name: this.editForm.goods_name,
            goods_price: this.editForm.goods_price,
            goods_number: this.editForm.goods_number,
            goods_weight: this.editForm.goods_weight,
            goods_introduce: this.editForm.goods_introduce,
            pics: pics,
            attrs: [],
            goods_cat: ''
          }
          form.goods_cat = this.editForm.goods_cat.join(',')
          // 处理商品参数
          this.manyTableData.forEach(item => {
            const newInfo = {
              attr_id: item.attr_id,
              attr_value: item.attr_value.join(',')
            }
            form.attrs.push(newInfo)
          })
          // 处理商品属性
          this.onlyTableData.forEach(item => {
            const newInfo = {
              attr_id: item.attr_id,
              attr_value: item.attr_vals
            }
            form.attrs.push(newInfo)
          })
          const {
            data: res
          } = await this.$http.put(`goods/${this.editForm.goods_id}`, form)
          if (res.meta.status === 200) {
            this.$message.success(res.meta.msg)
            this.$router.push('/goods')
          } else {
            this.$message.error(res.meta.msg)
          }
        } else {
          return this.$message.error('请填写必要的表单项')
        }
      })
    }
  }
}
</script>

<style lang="less" scoped>
  .el-steps .el-step {
    flex-basis: 16.6667% !important
  }

  .el-checkbox {
    margin: 0 10px 0 0 !important;
  }

  .previewImg {
    width: 100%;
  }

  .btnEdit {
    margin-top: 15px;
  }
</style>
